<div id="background">
    <div id="login">
        <img class="title" src="../img/login_title.png" alt="">
        <label class="account label">
            <span class="span account"></span>
            <input type="text" id="account-input" name="account" placeholder="请输入账号（非空即可）">
        </label>
        <label class="password label">
            <span class="span password"></span>
            <input type="password" id="password-input" name="password" placeholder="请输入密码（非空即可）">
        </label>
        <div id="login-btn">登　录</div>
        <div id="error-msg" class="layui-bg-blue">dd</div>
    </div>
    <button class="btn btn-danger" id="try_button">try</button>
</div>